Radio resource manager devices and radio communication devices

ABSTRACT

In an embodiment, a radio resource manager device is provided. The radio resource manager device may include a receiver configured to receive an application applying for radio resources; an interference allowance determiner configured to determine whether interference of signal transmission during radio communication using radio resources is allowed; and a radio resource assigner configured to assign radio resources based on the determined interference allowance.

TECHNICAL FIELD

Various embodiments relate generally to radio resource manager devicesand radio communication devices.

BACKGROUND

Femto Cells (FC) or Femto Cell Base Stations (FC BS) may be broadlydeployed in the near future, enabling operators to off-load CAPEX(Capital expenditures) and OPEX (Operational expenditure) to users. Inparticular, users may contribute to the acquisition of Base Station (BS)equipment by purchasing Femto Cell BS (FC-BS) and they will contributeto the operating costs by paying the energy bill. From a technicalperspective, such a deployment may be desired in order to achieve theultra-high data rates which 3GPP LTE (Third Generation PartnershipProject Long Term Evolution), 3GPP LTE-Advanced, IEEE 802.16m, etc. arecapable of. These systems may provide very high data rate occupying abroad spectrum; in order to keep the output power of the concerned BSand UE (User Equipment) reasonably low while exploiting the fullpotential, small cells need to be provided.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings, like reference characters generally refer to the sameparts throughout the different views. The drawings are not necessarilyto scale, emphasis instead generally being placed upon illustrating theprinciples of the invention. In the following description, variousembodiments of the invention are described with reference to thefollowing drawings, in which:

FIG. 1 shows a deployment scenario according to various embodiments;

FIG. 2 shows a radio resource manager device in accordance with anembodiment;

FIG. 3 shows a radio resource manager device in accordance with anembodiment;

FIG. 4 shows a radio communication device in accordance with anembodiment;

FIG. 5 shows a radio communication device in accordance with anembodiment;

FIG. 6 shows a flow diagram illustrating a radio resource managementmethod in accordance with an embodiment;

FIG. 7 shows a flow diagram illustrating a method for controlling aradio communication device in accordance with an embodiment;

FIG. 8 shows an architecture of a reconfigurable radio system;

FIG. 9 shows a structure of radio resource elements in accordance withan embodiment;

FIG. 10 shows a deployment scenario in accordance with an embodiment;

FIG. 11 shows an illustration of hierarchical radio resource managementand allocation of resource elements in accordance with an embodiment;

FIG. 12 shows an illustration of radio resource management toleratingthe presence of interference in accordance with an embodiment;

FIG. 13 shows an illustration of positioning of interference radiocommunication devices in the framework of radio resource management inaccordance with an embodiment;

FIG. 14 shows a flow diagram illustrating the process of selecting aninterfering radio communication device in accordance with an embodiment;

FIG. 15 shows an illustration of radio resource management toleratingthe presence of interference in accordance with an embodiment;

FIG. 16 shows an illustration of adding a new radio communication devicewith tolerating a controlled level of interference in accordance with anembodiment;

FIG. 17 shows a flow diagram illustrating an identification process fornewly entering radio communication devices in accordance with anembodiment;

FIG. 18 shows an illustration of de-activation of a radio communicationdevice combined with the reduction of interference in accordance with anembodiment;

FIG. 19 shows a flow diagram illustrating an identification process forswitching-off a radio communication device in accordance with anembodiment;

FIG. 20 shows a frame structure type 2 (TDD (Time Division Duplex) mode)for 3GPP LTE;

FIG. 21 shows a radio communication system providing assignmentinterleaving of distinct carriers and distinct radio resources inaccordance with an embodiment;

FIG. 22 shows an architecture of a reconfigurable radio system inaccordance with an embodiment; and

FIG. 23 shows an architecture of a reconfigurable radio system inaccordance with an embodiment.

DESCRIPTION

In various embodiments, femto cell base stations, like described in moredetail below, may be operated close to each other. In variousembodiments, radio resources, like described in more detail below, maybe assigned to the femto cell base stations. In various embodiments,there may be femto cell base stations, for which interference, asexplained in more detail below, may be acceptable or allowed, and theremay be femto cell base stations, for which interference may be necessaryto be strictly avoided. In an implementation, radio resources may beassigned to each of the femto cell base stations based on whetherinterference is acceptable for the femto cell base station or not. In animplementation, for the femto cell base stations accepting interference,overlapping radio resources may be assigned, which may lead tointerference in communication of those femto cell base stations, andwhich may lead to a better overall usage of radio resources. In animplementation, for the femto cell base stations for which interferenceis to be strictly avoided, radio resources may be exclusively assignedto each of those femto cell base stations, which may lead to acommunication without interference for those femto cell base stations.

The following detailed description refers to the accompanying drawingsthat show, by way of illustration, specific details and embodiments inwhich the invention may be practiced. These embodiments are described insufficient detail to enable those skilled in the art to practice theinvention. In this regard, directional terminology, such as “top”,“bottom”, “front”, “back”, “leading”, “trailing”, etc, is used withreference to the orientation of the Figure(s) being described. Becausecomponents of embodiments can be positioned in a number of differentorientations, the directional terminology is used for purposes ofillustration and is in no way limiting. Other embodiments may beutilized and structural, logical, and electrical changes may be madewithout departing from the scope of the invention. The variousembodiments are not necessarily mutually exclusive, as some embodimentscan be combined with one or more other embodiments to form newembodiments. The following detailed description therefore, is not to betaken in a limiting sense, and the scope of the present invention isdefined by the appended claims.

The word “exemplary” is used herein to mean “serving as an example,instance, or illustration”. Any embodiment or design described herein as“exemplary” is not necessarily to be construed as preferred oradvantageous over other embodiments or designs.

A radio communication device according to various embodiments may be adevice configured for wireless communication. In various embodiments, aradio communication device may be an end-user mobile device (MD). Invarious embodiments, a radio communication device may be any kind ofmobile telephone, personal digital assistant, mobile computer, or anyother mobile device configured for communication with a mobilecommunication base station or an access point and may be also referredto as a User Equipment (UE). In various embodiments, a radiocommunication device may be a femto cell base station or a Home Node Bbase station. In various embodiments, advanced base stations (advancedBS, ABS) and advanced mobile stations (advanced MS, AMS) in accordancewith IEEE 802.16m may be incorporated.

The radio resource manager device according to various embodiments mayinclude a memory which is for example used in the processing carried outby the end-user mobile devices. A memory used in the embodiments may bea volatile memory, for example a DRAM (Dynamic Random Access Memory) ora non-volatile memory, for example a PROM (Programmable Read OnlyMemory), an EPROM (Erasable PROM), EEPROM (Electrically Erasable PROM),or a flash memory, e.g., a floating gate memory, a charge trappingmemory, an MRAM (Magnetoresistive Random Access Memory) or a PCRAM(Phase Change Random Access Memory).

The radio communication device according to various embodiments mayinclude a memory which is for example used in the processing carried outby the end-user mobile devices. A memory used in the embodiments may bea volatile memory, for example a DRAM (Dynamic Random Access Memory) ora non-volatile memory, for example a PROM (Programmable Read OnlyMemory), an EPROM (Erasable PROM), EEPROM (Electrically Erasable PROM),or a flash memory, e.g., a floating gate memory, a charge trappingmemory, an MRAM (Magnetoresistive Random Access Memory) or a PCRAM(Phase Change Random Access Memory).

In an embodiment, a “circuit” may be understood as any kind of a logicimplementing entity, which may be special purpose circuitry or aprocessor executing software stored in a memory, firmware, or anycombination thereof. Thus, in an embodiment, a “circuit” may be ahard-wired logic circuit or a programmable logic circuit such as aprogrammable processor, e.g. a microprocessor (e.g. a ComplexInstruction Set Computer (CISC) processor or a Reduced Instruction SetComputer (RISC) processor). A “circuit” may also be a processorexecuting software, e.g. any kind of computer program, e.g. a computerprogram using a virtual machine code such as e.g. Java. Any other kindof implementation of the respective functions which will be described inmore detail below may also be understood as a “circuit” in accordancewith an alternative embodiment.

The terms “coupling” or “connection” are intended to include a direct“coupling” or direct “connection” as well as an indirect “coupling” orindirect “connection”, respectively.

The term “protocol” is intended to include any piece of software that isprovided to implement part of any layer of the communication definition.“Protocol” may include the functionality of one or more of the followinglayers: physical layer (layer 1), data link layer (layer 2), networklayer (layer 3), or any other sub-layer of the mentioned layers or anyupper layer.

In various embodiments, the mobile radio communication device may beconfigured as a home base station, e.g. as a Home NodeB, e.g. as a Home(e)NodeB. In an example, a ‘Home NodeB’ may be understood in accordancewith 3GPP as a trimmed-down version of a cellular mobile radio basestation optimized for use in residential or corporate environments(e.g., private homes, public restaurants or small office areas). Invarious examples throughout this description, the terms ‘Home BaseStation’, ‘Home NodeB’, ‘Home eNodeB’, ‘Femto Cell’, ‘Femto Cell BaseStation’ are referring to the same logical entity and will be usedinterchangeably throughout the entire description. FC-BS may be providedin accordance with a 3GPP standard, but may also be provided for anyother mobile radio communication standard, for example for IEEE 802.16m.

The so-called ‘Home Base Station’ concept shall support receiving andinitiating cellular calls at home, and uses a broadband connection(typically DSL, cable modem or fibre optics) to carry traffic to theoperator's core network bypassing the macro network architecture(including legacy NodeBs or E-NodeBs, respectively), i.e. the legacyUTRAN or E-UTRAN, respectively. Femto Cells shall operate with allexisting and future handsets rather than requiring customers to upgradeto expensive dual-mode handsets or UMA devices.

From the customer's perspective, ‘Home NodeBs’ offer the user a singlemobile handset with a built-in personal phonebook for all calls, whetherat home or elsewhere. Furthermore, for the user, there is only onecontract and one bill. Yet another effect of providing ‘Home NodeBs’ maybe seen in the improved indoor network coverage as well as in theincreased traffic throughput. Moreover, power consumption may be reducedas the radio link quality between a handset and a ‘Home Base Station’may be expected to be much better than the link between a handset andlegacy ‘NodeB’.

In an embodiment, access to a ‘Home NodeB’ may be allowed for a closeduser group only, i.e. the communication service offering may berestricted to employees of a particular company or family members, ingeneral, to the members of the closed user group. This kind of ‘HomeBase Stations’ may be referred to as ‘Closed Subscriber Group Cells’(CSG Cells) in 3GPP. A mobile radio cell which indicates being a CSGCell may need to provide its CSG Identity to the mobile radiocommunication terminal devices (e.g. the UEs). Such a mobile radio cellmay only be suitable for a mobile radio communication terminal device ifits CSG Identity is e.g. listed in the mobile radio communicationterminal device's CSG white list (a list of CSG Identities maintained inthe mobile radio communication terminal device or in an associated smartcard indicating the mobile radio cells which a particular mobile radiocommunication terminal device is allowed to use for communication). Invarious embodiments, a home base station may be a consumer device thatis connected to the mobile radio core network via fixed line (e.g. DSL)or wireless to a mobile radio macro cell. It may provide access tolegacy mobile devices and increase the coverage in buildings and thebandwidth per user. In various embodiments, a home base station may berun in open or closed mode. In closed mode the home base station mayprovide access to a so-called closed subscriber group (CSG) only.Examples for such closed subscriber groups are families or some or allemployees of a company, for example.

As a ‘Femto Cell’ entity or ‘Home Base Station’ entity will usually be abox of small size and physically under control of the user, in otherwords, out of the MNO's domain, it could be used nomadically, i.e. theuser may decide to operate it in his apartment, but also in a hotel whenhe is away from home, e.g. as a business traveler. Additionally a ‘HomeNodeB’ may be operated only temporarily, i.e. it can be switched on andoff from time to time, e.g. because the user does not want to operate itover night or when he leaves his apartment.

Various embodiments are provided for devices, and various embodimentsare provided for methods. It will be understood that basic properties ofthe devices also hold for the methods and vice versa. Therefore, forsake of brevity, duplicate description of such properties may beomitted.

FIG. 1 shows a deployment scenario 100 according to various embodiments.In the scenario 100, a building 102 with several rooms 104, 106, 108,110, 112 (in general with several portions of the building) is shown. Aradio communication device, such as for example a femto cell basestation, may be provided in each room (in general in each portion of thebuilding). A first radio communication device 114 may be provided in afirst room 104. A second radio communication device 116 may be providedin a second room 106. A third radio communication device 118 may beprovided in a third room 108. A fourth radio communication device 120may be provided in a fourth room 110. A fifth radio communication device122 may be provided in a fifth room 112. In each of the rooms, furtherradio communication devices, such as end-user mobile devices (MD), suchas user equipment (UE), may be operated. In the first room 104, a sixthradio communication device 124 may be operated. In the second room 106,a seventh radio communication device 126 and an eighth radiocommunication device 128 may be operated. In the third room 108, a ninthradio communication device 130 may be operated. In the fourth room 110,a tenth radio communication device 132 may be operated. In the fifthroom 112, an eleventh radio communication device 134, a twelfth radiocommunication device 136, and a thirteenth radio communication device138 may be operated. A radio base station, such as a macro cell basestation, such as a legacy radio base station, may be provided outsidethe house 102.

Although FIG. 1 shows a deployment like it may be present in a homedeployment or an office scenario, it is to be understood, that theapplication of various embodiments is not restricted to such a scenario.Various embodiments may be applied whenever radio communication devicesare present.

Femto Cells (FC) or Femto Cell Base Stations (FC BS) may be broadlydeployed in the near future, enabling operators to off-load CAPEX andOPEX to users. Users may contribute to the acquisition of Base Station(BS) equipment by purchasing Femto Cell BS (FC-BS) and they maycontribute to the operating costs by paying the energy bill. Such adeployment may be provided in order to achieve the ultra-high data rateswhich 3GPP LTE, 3GPP LTE-Advanced, IEEE 802.16m, etc. are capable of.These systems may provide very high data rate occupying a broadspectrum; in order to keep the output power of the concerned BS and UE(User Equipment) reasonably low while exploiting the full potential,small cells may be provided.

Within a densely populated area, however, a large number of FC-BS may bedeployed—for example, one FC-BS may be deployed per home (such as aprivately owned flat in a high-rise building, etc.). In such a context,as illustrated below, the available spectrum may be largely insufficientif each FC-BS is controlling an entire cellular band.

In various embodiments, the situation of limited spectrum may beaddressed by a hierarchical radio resource management (HRRM) approach.The HRRM approach according to various embodiments may be applied to3GPP LTE, or any other radio communication technology as stated below.According to various embodiments, each radio communication device, forexample each FC-BS, may be assigned a sub-set of the available dataslots for up/downlink. The assignment of radio resources to the UEattached to such a radio communication device, for example FC-BS, may belimited to operate within the given sub-set. According to variousembodiments, the available resources may be finely split among a largenumber of available areas provided by radio communication devices, suchas Femto Cells.

According to various embodiments, a framework for interferencemanagement for Femto-Cell Base Stations (FC-BS) is provided.

According to various embodiments, a realization is provided of a radiocommunication device that may be operated a FC-BS or as a UE, i.e. aDual Mode FC BS/UE, and the integration of a hierarchical radio resourcemanagement (HRRM) into a device providing such a dual mode.

According to various embodiments, spectrum assignment to radiocommunication devices, for example Femto-Cell BS, in a dense deploymentof a large number of radio communication devices, for example FC-BS, maybe provided.

For spectrum assignment to Femto-Cell BS in a dense deployment of alarge number of FC-BS, commonly two approaches are considered:

1) Power level adaptation, i.e. reducing the Femto-Cell coverage so muchthat the available spectrum may be shared among FC-BS without causinginterference (or minimizing the resulting level of interference);

2) Sharing the available spectrum among the FC-BS as long as sufficientspectrum is available. In this case, one channel may be entirelydedicated to a FC-BS.

In both approaches, in the context of a very dense FC-BS deployment, thepower level adaptation may lead to a very limited coverage of FC-BS,such that even near-by user device may function at modes of low spectralefficiency and thus delivering poor QoS (Quality of Service). Theapproach of sharing the available spectrum among the various FC-BS maybe inherently becoming impossible with a high number of deployed FC-BS(under the assumption that each FC-BS may obtain an entire channel of upto 20 MHz Bandwidth).

In various embodiments, a hierarchical radio resource management (HRRM)approach is provided as described herein.

In various embodiments, the integration of the HRRM into an architecturefor a dual mode device that may operate as a femto-cell BS and UE isprovided. In various embodiments, the integration of a HRRM unit into anarchitecture for a dual mode device that may operate as a femto-cell BSand UE is provided.

According to various embodiments, an optimum distribution of resourcesamong multiple client devices, for example FC-BS, may be achieved:Depending on the requirements of the various client devices, a resourcedistribution without or with a partial level of controlled interferencemay be allowed. This may lead to a better usage of the availableresources compared to existing solutions.

According to various embodiments, a new client device, for example a newFC-BS, may be added into a client device framework, for example a FC-BSframework. An efficient process for identifying suitable resources fornewly entering client device may be provided in various embodiments.

According to various embodiment, a client device, for example a FC-BS,may be removed from a client device framework, for example a FC-BSframework. An efficient process for re-distributing freed resources maybe provided in various embodiments.

According to various embodiments, the integration of Radio ResourceManagement (RRM) functionalities into a dual mode FC-BS/UE device may beprovided: The approach may enable manufacturers to build a dual modeFC-BS/UE device exploiting an existing UE SDR architecture.

FIG. 2 shows a radio resource manager device 200 in accordance with anembodiment. The radio resource manager device 200 may include a receiver202 configured to receive an application applying for radio resources;an interference allowance determiner 204 configured to determine whetherinterference of signal transmission during radio communication usingradio resources is allowed; and a radio resource assigner 206 configuredto assign radio resources based on the determined interferenceallowance. The receiver 202, the interference allowance determiner 204and the radio resource assigner 206 may be coupled with each other, e.g.via an electrical connection 208 such as e.g. a cable or a computer busor via any other suitable electrical connection to exchange electricalsignals.

It will be understood that in various embodiments, determining may beunderstood as making a determination depending on the current situation.In various embodiments, determining does not mean having a fixedassignment of determination, which does not change but remains constantall the time.

In various embodiments, the interference allowance determiner 204 mayoperate based on the current radio context. In various embodiments, theradio resource assigner 206 may operate based on the current radiocontext.

In various embodiments, the receiver 202 may further be configured toreceive an application of a client device applying for radio resources.In various embodiments, the interference allowance determiner 204 mayfurther be configured to determine whether interference of signaltransmission during radio communication using radio resources assignedto the client device is allowed for the client device. In variousembodiments, the radio resource assigner 206 may further be configuredto assign radio resources to the client device based on the determinedinterference allowance of the client device.

In various embodiments, interference of signal transmission may beunderstood in a way that the transmission of a signal leads tointerference with another transmission.

The interference allowance determiner 204 may be configured to determinewhether interference of signal transmission during radio communicationusing radio resources assigned to the client device is allowed for theclient device based on an information acquired from a database, whichmay store interference allowance information of each client device, i.e.the database may store a relation between an identifier foridentification of the client device and interference allowanceinformation indicating whether interference of signal transmissionduring radio communication using radio resources assigned to the clientdevice is allowed for the client device.

In various embodiments, the radio resource manager device 200 mayprovide an efficient data exchange meeting the QoS (for example datarate) requirements of the users.

In various embodiments, the radio resource manager device 200 (invarious embodiments for example the radio resource assigner 206 in theradio resource manager device 200) may be configured to i) check whetherthe QoS requirements can be met without introducing interference, ii) Ifa solution can be found for i) without introducing interference, thecorresponding resource assignment may be used, otherwise a resourceassignment may be used that leads to a low level of interference inorder to minimize the corresponding loss of system capacity, iii) IfFC-BS leave the system, the correspondingly unused resource elements maybe redistributed—this may lead to a complete reconsideration of theresource assignment and a previously interference-dominated system maybecome (nearly) interference-free, iv) if the resource requirements ofsome FC-BS change, also an overall reassignment of resources to FC-BSmay be considered.

It is to be noted that “interference” in accordance with variousembodiments is different from the “interference” in typical wirelesscellular networks. In existing cellular networks, inter-cellinterference may occur if cells are neighboring and the signals aresomehow overlapping. Typically, the resulting interference levels may below. This may be not the type of interference that may occur inaccordance with various embodiments—according to various applications ofvarious embodiments, a very dense (and typically chaotic) femto-celldeployment may be considered (since user may put their femto cellsanywhere, this may lead to a chaotic deployment). Therefore, theinterference levels may be potentially very strong which may lead to avery different case compared to the traditional neighboringcell-interference case. In various embodiments, as will be explained inmore detail below, the radio resource manager device 200 may resourcesto the various FC-BS such that the interfering FC-BS may be positionedfar from each other. The radio resource manager 200 may ensure that theinterference characteristics get close to the traditionalcell-interference case; however, it may not always be possible.

In various embodiments, the radio resource manager device 200 may beapplied to a dense FC-BS deployment. In various embodiments, the radioresource manager device 200 may be operated in a dense FC-BS deployment.

FIG. 3 shows a radio resource manager device 300 in accordance with anembodiment. The radio resource manager device 300, similarly to theradio resource manager device 200 of FIG. 2, may include a receiver 202configured to receive an application applying for radio resources; aninterference allowance determiner 204 configured to determine whetherinterference of signal transmission during radio communication usingradio resources is allowed; and a radio resource assigner 206 configuredto assign radio resources based on the determined interferenceallowance. The radio resource manager device 300 may further include aradio resource re-assignment determiner 302, as will be explained inmore detail below. The radio resource manager device 300 may furtherinclude a virtual radio resource assigner 304, as will be explained inmore detail below. The receiver 202, the interference allowancedeterminer 204, the radio resource assigner 206, the radio resourcere-assignment determiner 302, and the virtual radio resource assigner304 may be coupled with each other, e.g. via an electrical connection208 such as e.g. a cable or a computer bus or via any other suitableelectrical connection to exchange electrical signals.

In various embodiments, the receiver 202 may further be configured toreceive an application of a client device applying for radio resources.In various embodiments, the interference allowance determiner 204 mayfurther be configured to determine whether interference of signaltransmission during radio communication using radio resources assignedto the client device is allowed for the client device. In variousembodiments, the radio resource assigner 206 may further be configuredto assign radio resources to the client device based on the determinedinterference allowance of the client device.

In various embodiments, the radio resource manager device 300 mayinclude a radio resource re-assignment determiner 302 configured todetermine whether a re-assignment of radio resources is to be performed.

In various embodiments, the radio resource re-assignment determiner 302may be configured to determine whether a re-assignment of radioresources is to be performed based on whether a client device newlyapplies for radio resources. In case a client device newly applies forradio resources, radio resources that the radio resource manager device300 has previously assigned to other client devices, may be re-assignedby the radio resource manager device 300.

In various embodiments, the radio resource re-assignment determiner 302may be configured to determine whether a re-assignment of radioresources is to be performed based on whether a client device resignsfrom using the radio resources assigned to the client device resigningfrom using the radio resources. In case a client device does not use theradio resources the radio resource manager device 300 has assigned to itanymore, the respective radio resources may be re-assigned by the radioresource manager device 300.

In various embodiments, the radio resource re-assignment determiner 302may be configured to determine whether a re-assignment of radioresources is to be performed based on whether information on whetherinterference is allowed for a client device, to which the radio resourcemanager 300 has assigned radio resources, has changed. In caseinformation on whether interference is allowed for a client devicechanges, the radio resource manager device 300 may re-assign radioresources, both to the client device for which the information onwhether interference is allowed has changed, and also for other clientdevices.

In various embodiments, the radio resource re-assignment determiner 302may be configured to determine that re-assignment of radio resources isto be performed based on any kind of trigger, for example a trigger fromany kind of network element.

In various embodiments, the radio resource manager device 300 mayfurther include a virtual radio resource assigner 304 configured tocompute an assignment of radio resources to a client device. The radioresource re-assignment determiner 302 may be configured to determinewhether a re-assignment of radio resources is to be performed based onthe result of the virtual radio resource assigner 304.

In various embodiments, the radio resource manager device 300 mayfurther include a radio resource re-assigner (not shown) configured tore-assign radio resources based on the result of the radio resourcere-assignment determiner 302.

In various embodiments, the radio resource manager device 300 mayfurther include a radio resource re-assigner configured to re-assignradio resources based on the assignment of radio resources computed bythe virtual radio resource assigner 304.

In various embodiments, the radio resources may include distinctsub-areas in the frequency-time plane, as explained in more detailbelow.

In various embodiments, the radio resources may include resourceelements, as will be explained in more detail below.

In various embodiments, the radio resources may include 3GPP LTEresource elements, as will be explained in more detail below.

In various embodiments, the radio resource assigner 206 may further beconfigured to assign radio resources exclusively to the client device,in case the determined interference allowance indicates thatinterference is not allowed for the client device.

In various embodiments, the radio resource assigner may further beconfigured to assign radio resources non-exclusively to the clientdevice, in case the determined interference allowance indicates thatinterference is allowed for the client device.

In various embodiments, the radio resource manager device 300 mayfurther include a location determiner (not shown) configured todetermine the location of the client device. In various embodiments, theradio resource assigner may be further configured to assign radioresources non-exclusively to the client device based on the determinedlocation of the client device, in case the determined interferenceallowance indicates that interference is allowed for the client device.

In various embodiments, the radio resource manager device 300 mayfurther include an already-assigned radio resources information manager(not shown) configured to record information indicating the radioresources assigned to at least one client device

In various embodiments, the radio resource manager device 300 mayfurther include an interference estimator (not shown) configured toestimate interference of signal transmission during radio communicationusing the same radio resources at different pre-determined locations.

In various embodiments, the radio resource assigner may further beconfigured in case of assigning the same radio resources non-exclusivelyto at least two client devices to choose the at least two client devicesso that the estimated interference between the at least two clientdevices is below a threshold value.

In various embodiments, the radio resource assigner 206 may further beconfigured in case of assigning the same radio resources non-exclusivelyto at least two client devices to choose the at least two client devicesso that the estimated interference between the at least two clientdevices is a minimum value over all possible assignments.

In various embodiments, the radio resource assigner 206 may further beconfigured in case of assigning the same radio resources non-exclusivelyto at least two client devices to choose the at least two client devicesbased on the relative location of the client devices.

In various embodiments, the radio resource assigner 206 may further beconfigured to choose the at least two client devices so that thedistance between the at least two client devices is higher than apre-determined threshold value.

In various embodiments, the radio resource assigner 206 may further beconfigured to choose the at least two client devices so that thedistance between the at least two client devices is higher than thedistance between any two of the two client devices and a plurality ofother client devices applying for radio resources.

In various embodiments, the radio resource assigner 206 may further beconfigured to assign radio resources of different carrier frequencies toat least one client device applying for radio resources.

In various embodiments, the radio resource assigner 206 may further beconfigured to assign radio resources of different carrier frequencies toneighboring client devices applying for radio resources.

FIG. 4 shows a radio communication device 400 in accordance with anembodiment. The radio communication device 400 may include aninterference allowance information setter 402 configured to setinterference allowance information indicating whether interference ofsignal transmission during radio communication using assigned radioresources is allowed, and a radio resource information acquirer 404configured to acquire radio resource information indicating assignedradio resources based on the interference allowance information. Theinterference allowance information setter 402 and the radio resourceinformation acquirer 404 may be coupled with each other, e.g. via anelectrical connection 406 such as e.g. a cable or a computer bus or viaany other suitable electrical connection to exchange electrical signals.

In various embodiments, the interference allowance information setter402 may further be configured to set interference allowance informationindicating whether interference of signal transmission during radiocommunication using radio resources assigned to the radio communicationdevice 400 is allowed for the radio communication device 400. In variousembodiments, the radio resource information acquirer 404 may further beconfigured to acquire radio resource information indicating radioresources assigned to the radio communication device 400 based on theinterference allowance information.

FIG. 5 shows a radio communication device 500 in accordance with anembodiment. The radio communication device 500, similarly to the radiocommunication device 400 of FIG. 4, may include an interferenceallowance information setter 402 configured to set interferenceallowance information indicating whether interference of signaltransmission during radio communication using radio resources isallowed, and a radio resource information acquirer 404 configured toacquire radio resource information indicating assigned radio resourcesbased on the interference allowance information. The radio communicationdevice 500 may further include an interference allowance informationtransmitter 502, as will be explained in more detail below. The radiocommunication device 500 may further include an interference allowancedeterminer 504, as will be explained in more detail below. The radiocommunication device 500 may further include a receiver 506, as will beexplained in more detail below. The radio communication device 500 mayfurther include a radio resource assigner 508, as will be explained inmore detail below. The radio communication device 500 may furtherinclude a radio communication terminal functionality circuit 510, aswill be explained in more detail below. The radio communication device500 may further include an extension circuit 512, as will be explainedin more detail below. The radio communication device 500 may furtherinclude an extension circuit activator 514, as will be explained in moredetail below. The interference allowance information setter 402, theradio resource information acquirer 404, the interference allowanceinformation transmitter 502, the interference allowance determiner 504,the receiver 506, the radio resource assigner 508, the radiocommunication terminal functionality circuit 510, the extension circuit512, and the extension circuit activator 514 may be coupled with eachother, e.g. via an electrical connection 406 such as e.g. a cable or acomputer bus or via any other suitable electrical connection to exchangeelectrical signals.

In various embodiments, the interference allowance information setter402 may further be configured to set interference allowance informationindicating whether interference of signal transmission during radiocommunication using radio resources assigned to the radio communicationdevice 500 is allowed for the radio communication device 500. In variousembodiments, the radio resource information acquirer 404 may further beconfigured to acquire radio resource information indicating radioresources assigned to the radio communication device 500 based on theinterference allowance information.

In various embodiments, the radio communication device 500 be configuredaccording to at least one of the following radio communicationtechnologies: a Global System for Mobile Communications (GSM) radiocommunication technology, a General Packet Radio Service (GPRS) radiocommunication technology, an Enhanced Data Rates for GSM Evolution(EDGE) radio communication technology, and/or a Third GenerationPartnership Project (3GPP) radio communication technology (e.g. UMTS(Universal Mobile Telecommunications System), FOMA (Freedom ofMultimedia Access), 3GPP LTE (long term Evolution), 3GPP LTE Advanced(long term Evolution Advanced)), CDMA2000 (Code division multiple access2000), CDPD (Cellular Digital Packet Data), Mobitex, 3G (ThirdGeneration), CSD (Circuit Switched Data), HSCSD (High-SpeedCircuit-Switched Data), UMTS (3G) (Universal Mobile TelecommunicationsSystem (Third Generation)), W-CDMA (UMTS) (Wideband Code DivisionMultiple Access (Universal Mobile Telecommunications System)), HSPA(High Speed Packet Access), HSDPA (High-Speed Downlink Packet Access),HSUPA (High-Speed Uplink Packet Access), HSPA+ (High Speed Packet AccessPlus), UMTS-TDD (Universal Mobile TelecommunicationsSystem—Time-Division Duplex), TD-CDMA (Time Division—Code DivisionMultiple Access), TD-CDMA (Time Division—Synchronous Code DivisionMultiple Access), 3GPP Rel. 8 (Pre-4G) (3rd Generation PartnershipProject Release 8 (Pre-4th Generation)), UTRA (UMTS Terrestrial RadioAccess), E-UTRA (Evolved UMTS Terrestrial Radio Access), LTE Advanced(4G) (long term Evolution Advanced (4th Generation)), cdmaOne (2G),CDMA2000 (3G) (Code division multiple access 2000 (Third generation)),EV-DO (Evolution-Data Optimized or Evolution-Data Only), AMPS (1G)(Advanced Mobile Phone System (1st Generation)), TACS/ETACS (TotalAccess Communication System/Extended Total Access Communication System),D-AMPS (2G) (Digital AMPS (2nd Generation)), PTT (Push-to-talk), MTS(Mobile Telephone System), IMTS (Improved Mobile Telephone System), AMTS(Advanced Mobile Telephone System), OLT (Norwegian for OffentligLandmobil Telefoni, Public Land Mobile Telephony), MTD (Swedishabbreviation for Mobiltelefonisystem D, or Mobile telephony system D),Autotel/PALM (Public Automated Land Mobile), ARP (Finnish forAutoradiopuhelin, “car radio phone”), NMT (Nordic Mobile Telephony),Hicap (High capacity version of NTT (Nippon Telegraph and Telephone)),CDPD (Cellular Digital Packet Data), Mobitex, DataTAC, iDEN (IntegratedDigital Enhanced Network), PDC (Personal Digital Cellular), CSD (CircuitSwitched Data), PHS (Personal Handy-phone System), WiDEN (WidebandIntegrated Digital Enhanced Network), iBurst, Unlicensed Mobile Access(UMA, also referred to as also referred to as 3GPP Generic AccessNetwork, or GAN standard)), the public safety standard TETRA(Terrestrial Trunked Radio), ETSI (European Telecommunications StandardsInstitute) TS (Technical Specification) 101 376 (Geo-Mobile Radio GMR-13G (Third Generation)), and various satellite communication standards.

In various embodiments, the radio communication device 500 may furtherinclude an interference allowance information transmitter 502 configuredto transmit the interference allowance information set in theinterference allowance information setter 402 to a radio resourcemanager device. In various embodiments, the radio resource informationacquirer 404 may further be configured to acquire the radio resourceinformation from the radio resource manager device.

In various embodiments, the interference allowance informationtransmitter 502 may further be configured to re-transmit theinterference allowance information in case the interference allowanceinformation is changed in the interference allowance information setter402.

In various embodiments, the radio communication device 500 may beconfigured to provide radio communication terminal functionality.

In various embodiments, the radio communication device 500 may beconfigured according to an ETSI (European Telecommunications StandardsInstitute) RRS (Reconfigurable Radio Systems) Architecture of a userequipment, as will be explained in more detail below.

In various embodiments, the radio communication device 500 may be anend-user mobile device.

In various embodiments, the radio communication device 500 may be auser-equipment.

In various embodiments, the radio communication device 500 may be aradio communication terminal.

In various embodiments, radio communication device 500 may be a mobilestation.

In various embodiments, the radio communication device 500 may beconfigured to provide femto cell base station functionality.

In various embodiments, the radio communication device 500 may beconfigured to provide Home Node B functionality.

In various embodiments, the radio communication device 500 may beconfigured to provide Home Node B functionality.

In various embodiments, the radio communication device 500 may beconfigured to provide radio access using the assigned radio resources toa further radio communication device.

In various embodiments, the radio communication device 500 may beconfigured to provide the functionality of a radio communication managerdevice as described above and below. For example, the radiocommunication device 500 may be a femto cell base station, which mayassign the radio resources it has been assign by a radio resourcemanager device of the network operator's network two client devices sucha MD or UE in a similar way it has been assigned the radio resources.

In various embodiments, the radio communication device 500 may include areceiver 506 configured to receive an application applying for radioresources; an interference allowance determiner 506 configured todetermine whether interference of signal transmission during radiocommunication using radio resources is allowed; and a radio resourceassigner 508 configured to assign radio resources based on thedetermined interference allowance.

In various embodiments, the receiver 506 of the radio communicationdevice 500 may further be configured to receive an application of aclient device applying for radio resources. In various embodiments, theinterference allowance determiner 506 of the radio communication device500 may further be configured to determine whether interference ofsignal transmission during radio communication using radio resourcesassigned to the client device is allowed for the client device. Invarious embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured to assign radioresources to the client device based on the determined interferenceallowance of the client device.

The interference allowance determiner 504 of the radio communicationdevice 500 may be configured to determine whether interference of signaltransmission during radio communication using radio resources assignedto the client device is allowed for the client device based on aninformation acquired from a database, which may store interferenceallowance information of each client device, i.e. the database may storea relation between an identifier for identification of the client deviceand interference allowance information indicating whether interferenceof signal transmission during radio communication using radio resourcesassigned to the client device is allowed for the client device.

In various embodiments, the radio communication device 500 may include aradio resource re-assignment determiner (not shown) configured todetermine whether a re-assignment of radio resources is to be performed.

In various embodiments, the radio resource re-assignment determiner ofthe radio communication device 500 may be configured to determinewhether a re-assignment of radio resources is to be performed based onwhether a client device newly applies for radio resources. In case aclient device newly applies for radio resources, radio resources thatthe radio communication device 500 has previously assigned to otherclient devices, may be re-assigned by the radio communication device500.

In various embodiments, the radio resource re-assignment determiner ofthe radio communication device 500 may be configured to determinewhether a re-assignment of radio resources is to be performed based onwhether a client device resigns from using the radio resources assignedto the client device resigning from using the radio resources. In case aclient device does not use the radio resources the radio resourcemanager device of the radio communication device 500 has assigned to itanymore, the respective radio resources may be re-assigned by the radiocommunication device 500.

In various embodiments, the radio resource re-assignment determiner ofthe radio communication device 500 may be configured to determinewhether a re-assignment of radio resources is to be performed based onwhether information on whether interference is allowed for a clientdevice, to which the radio communication device 500 has assigned radioresources, has changed. In case information on whether interference isallowed for a client device changes, the radio communication device 500may re-assign radio resources, both to the client device for which theinformation on whether interference is allowed has changed, and also forother client devices.

In various embodiments, the radio communication device 500 may furtherinclude a virtual radio resource assigner (not shown) configured tocompute an assignment of radio resources to a client device. The radioresource re-assignment determiner of the radio communication device 500may be configured to determine whether a re-assignment of radioresources is to be performed based on the result of the virtual radioresource assigner of the radio communication device 500.

In various embodiments, the radio communication device 500 may furtherinclude a radio resource re-assigner (not shown) configured to re-assignradio resources based on the result of the radio resource re-assignmentdeterminer of the radio communication device 500.

In various embodiments, the radio communication device 500 may furtherinclude a radio resource re-assigner (not shown) configured to re-assignradio resources based on the assignment of radio resources computed bythe virtual radio resource assigner of the radio communication device500.

In various embodiments, the radio resources may include distinctsub-areas in the frequency-time plane, as explained in more detailbelow.

In various embodiments, the radio resources may include resourceelements, as will be explained in more detail below.

In various embodiments, the radio resources may include 3GPP LTEresource elements, as will be explained in more detail below.

In various embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured to assign radioresources exclusively to the client device, in case the determinedinterference allowance indicates that interference is not allowed forthe client device.

In various embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured to assign radioresources non-exclusively to the client device, in case the determinedinterference allowance indicates that interference is allowed for theclient device.

In various embodiments, the radio communication device 500 may furtherinclude a location determiner (not shown) configured to determine thelocation of the client device. In various embodiments, the radioresource assigner 508 of the radio communication device 500 may furtherbe configured to assign radio resources non-exclusively to the clientdevice based on the determined location of the client device, in casethe determined interference allowance indicates that interference isallowed for the client device.

In various embodiments, the radio communication device 500 may furtherinclude an already-assigned radio resources information manager (notshown) configured to record information indicating the radio resourcesassigned to at least one client device

In various embodiments, the radio communication device 500 may furtherinclude an interference estimator (not shown) configured to estimateinterference of signal transmission during radio communication using thesame radio resources at different pre-determined locations.

In various embodiments, the radio resource assigner of the radiocommunication device 500 may further be configured in case of assigningthe same radio resources non-exclusively to at least two client devicesto choose the at least two client devices so that the estimatedinterference between the at least two client devices is below athreshold value.

In various embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured in case of assigningthe same radio resources non-exclusively to at least two client devicesto choose the at least two client devices so that the estimatedinterference between the at least two client devices is a minimum valueover all possible assignments.

In various embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured in case of assigningthe same radio resources non-exclusively to at least two client devicesto choose the at least two client devices based on the relative locationof the client devices.

In various embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured to choose the atleast two client devices so that the distance between the at least twoclient devices is higher than a pre-determined threshold value.

In various embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured to choose the atleast two client devices so that the distance between the at least twoclient devices is higher than distance between any two of the two clientdevices and a plurality of other client devices applying for radioresources.

In various embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured to assign radioresources of different carrier frequencies to at least one client deviceapplying for radio resources.

In various embodiments, the radio resource assigner 508 of the radiocommunication device 500 may further be configured to assign radioresources of different carrier frequencies to neighboring client devicesapplying for radio resources.

In various embodiments, the radio communication device 500 may furtherinclude a location information transmitter (not shown) configured totransmit information indicating the location of the radio communicationdevice to the radio resource manager.

In various embodiments, the interference allowance information settermay further be configured to set the interference allowance informationaccording to an instruction of the user of the radio communicationdevice 500.

In various embodiments, the interference allowance information settermay further be configured to set the interference allowance informationaccording to quality of service requirements of the radio communicationdevice 500.

In various embodiments, the interference allowance information settermay further be configured to set the interference allowance informationaccording to an instruction of a user of the client device.

In various embodiments, the interference allowance information settermay further be configured to set the interference allowance informationaccording to quality of service requirements of the client device.

In various embodiments, the radio resources may include distinctsub-areas in the frequency-time plane.

In various embodiments, the radio resources may include resourceelements.

In various embodiments, the radio resources may include 3GPP LTEresource elements.

In various embodiments, the radio communication device 500 may furtherinclude a radio communication terminal functionality circuit 510configured to provide radio communication terminal functionality, asexplained in more detail below.

In various embodiments, the radio communication device 500 may furtherinclude an extension circuit 512 configured to provide radio basestation functionality using the radio communication terminalfunctionality circuit, as explained in more detail below.

In various embodiments, the extension circuit 512 may include a gatewayaccess circuit configured to provide access to a radio base stationgateway in a radio communication network, as explained in more detailbelow.

In various embodiments, the radio communication device 500 may furtherinclude an extension circuit activator 514 configured to activate theextension circuit, as explained in more detail below.

By selectively activating or de-activating the extension circuit 512,the extension circuit activator 514 may determine the operation mode ofthe radio communication device 500. In case the extension circuitactivator 514 controls the extension circuit 512 to be de-activated, theradio communication device 500 may perform operation according to aradio communication terminal (for example a MD or a UE) using the radiocommunication terminal functionality circuit 510. In case the extensioncircuit activator 514 controls the extension circuit 512 to beactivated, the radio communication device 500 may perform operationaccording to a radio base station (for example a femto cell basestation, or for example a Home Node B, or for example an eHome Node B)using the radio communication terminal functionality circuit 510 and inaddition the extension circuit 512.

In an embodiment, a radio resource manager device may be provided. Theradio resource manager device may be configured to assign radioresources to a client device applying for radio resources based onwhether interference of signal transmission during radio communicationusing radio resources assigned to the client device is allowed for theclient device.

In an embodiment, a radio communication device may be provided. Theradio communication device may be configured to acquire radio resourceinformation indicating radio resources assigned to the radiocommunication device based on whether interference of signaltransmission during radio communication using radio resources assignedto the client device is allowed for the client device.

In an embodiment, a radio resource manager device may be provided. Invarious embodiments, the radio resource manager device may be configuredto assign radio resources of different carrier frequencies to at leastone client device applying for radio resources. In various embodiments,the radio resource manager device may be further configured to assignradio resources of different carrier frequencies to neighboring clientdevices applying for radio resources.

FIG. 6 shows a flow diagram 600 illustrating a radio resource managementmethod in accordance with an embodiment. In 602, an application applyingfor radio resources may be received. In various embodiments, anapplication of a client device applying for radio resources may bereceived. In 604, it may be determined whether interference of signaltransmission during radio communication using radio resources isallowed. In various embodiments, it may be determined whetherinterference of signal transmission during radio communication usingradio resources assigned to the client device is allowed for the clientdevice. In 606, radio resources may be assigned based on the determinedinterference allowance. In various embodiments, radio resources may beassigned to the client device based on the determined interferenceallowance of the client device.

It will be understood that in various embodiments, determining may beunderstood as making a determination depending on the current situation.In various embodiments, determining does not mean having a fixedassignment of determination, which does not change but remains constantall the time.

In various embodiments, the determining whether interference is allowedmay be performed based on the current radio context. In variousembodiments, assignment of radio resources may be performed based on thecurrent radio context.

In 604, it may be determined whether interference of signal transmissionduring radio communication using radio resources assigned to the clientdevice is allowed for the client device based on an information acquiredfrom a database, which may store interference allowance information ofeach client device, i.e. the database may store a relation between anidentifier for identification of the client device and interferenceallowance information indicating whether interference of signaltransmission during radio communication using radio resources assignedto the client device is allowed for the client device.

In various embodiments, it may be determined whether a re-assignment ofradio resources is to be performed.

In various embodiments, it may be determined whether a re-assignment ofradio resources is to be performed based on whether a client devicenewly applies for radio resources. In case a client device newly appliesfor radio resources, radio resources that have previously been assigned,may be re-assigned.

In various embodiments, it may be determined whether a re-assignment ofradio resources is to be performed based on whether a client deviceresigns from using the radio resources assigned to the client deviceresigning from using the radio resources. In case a client device doesnot use the radio resources that have been assigned to it, therespective radio resources may be re-assigned.

In various embodiments, it may be determined whether a re-assignment ofradio resources is to be performed based on whether information onwhether interference is allowed for a client device, to which radioresources have been assigned, has changed. In case information onwhether interference is allowed for a client device changes, radioresources may be re-assigned, both to the client device for which theinformation on whether interference is allowed has changed, and also forother client devices.

In various embodiments, a resource attribution process when a new FC-BSis added may be provided. In various embodiments, a resource attributionprocess when a FC-BS is switched off may be provided.

In various embodiments, an assignment of radio resources to a clientdevice may be computed. It may be determined whether a re-assignment ofradio resources is to be performed based on the assignment computationresult.

In various embodiments, radio resources may be re-assigned based on there-assignment determination.

In various embodiments, radio resources may be re-assigned based on thecomputed assignment of radio resources.

In various embodiments, the radio resources may include distinctsub-areas in the frequency-time plane, as explained in more detailbelow.

In various embodiments, the radio resources may include resourceelements, as will be explained in more detail below.

In various embodiments, the radio resources may include 3GPP LTEresource elements, as will be explained in more detail below.

In various embodiments, radio resources may be assigned exclusively tothe client device, in case the determined interference allowanceindicates that interference is not allowed for the client device.

In various embodiments, radio resources may be assigned non-exclusivelyto the client device, in case the determined interference allowanceindicates that interference is allowed for the client device.

In various embodiments, the location of the client device may bedetermined. In various embodiments, radio resources may be assignednon-exclusively to the client device based on the determined location ofthe client device, in case the determined interference allowanceindicates that interference is allowed for the client device.

In various embodiments, information indicating the radio resourcesassigned to at least one client device may be recorded.

In various embodiments, interference of signal transmission during radiocommunication using the same radio resources at different pre-determinedlocations may be estimated.

In various embodiments, in case of assigning the same radio resourcesnon-exclusively to at least two client devices, the at least two clientdevices may be chosen so that the estimated interference between the atleast two client devices is below a threshold value.

In various embodiments, in case of assigning the same radio resourcesnon-exclusively to at least two client devices, the at least two clientdevices may be chosen so that the estimated interference between the atleast two client devices is a minimum value over all possibleassignments.

In various embodiments, in case of assigning the same radio resourcesnon-exclusively to at least two client devices, the at least two clientdevices may be chosen based on the relative location of the clientdevices.

In various embodiments, the at least two client devices may be chosen sothat the distance between the at least two client devices is higher thana pre-determined threshold value.

In various embodiments, the at least two client devices may be chosen sothat the distance between the at least two client devices is higher thanthe distance between any two of the two client devices and a pluralityof other client devices applying for radio resources.

In various embodiments, radio resources of different carrier frequenciesmay be assigned to at least one client device applying for radioresources.

In various embodiments, radio resources of different carrier frequenciesmay be assigned to neighboring client devices applying for radioresources.

FIG. 7 shows a flow diagram 700 illustrating a method for controlling aradio communication device in accordance with an embodiment. In 702,interference allowance information indicating whether interference ofsignal transmission during radio communication using assigned radioresources is allowed may be set. In various embodiments, interferenceallowance information indicating whether interference of signaltransmission during radio communication using radio resources assignedto the radio communication device is allowed for the radio communicationdevice may be set. In 704, radio resource information indicatingassigned radio resources may be acquired based on the interferenceallowance information. In various embodiments, radio resourceinformation indicating radio resources assigned to the radiocommunication device may be acquired based on the interference allowanceinformation

In various embodiments, the interference allowance information set inthe interference allowance information setter may be transmitted to aradio resource manager device. In various embodiments, the radioresource information may be acquired from the radio resource managerdevice.

In various embodiments, the interference allowance information may bere-transmitted in case the interference allowance information is changedin the interference allowance information setting step 702.

In various embodiments, radio communication terminal functionality maybe provided.

In various embodiments, functionality according to an ETSI RSSArchitecture of a user equipment, as will be explained in more detailbelow, may be provided.

In various embodiments, the radio communication device may be anend-user mobile device.

In various embodiments, the radio communication device may be auser-equipment.

In various embodiments, the radio communication device may be a radiocommunication terminal.

In various embodiments, radio communication device may be a mobilestation.

In various embodiments, femto cell base station functionality may beprovided.

In various embodiments, Home Node B functionality may be provided.

In various embodiments, Home eNode B functionality may be provided.

In various embodiments, radio access using the assigned radio resourcesto a further radio communication device may be provided.

In various embodiments, the functionality of a radio communicationmanagement method as described above and below may be provided. Forexample, the radio communication device may operate as a femto cell basestation, which may assign the radio resources it has been assign by aradio resource manager device of the network operator's network toclient devices such a MD or UE in a similar way it has been assigned theradio resources.

In various embodiments, an application applying for radio resources maybe received; it may be determined whether interference of signaltransmission during radio communication using radio resources isallowed; and radio resources may be assigned based on the determinedinterference allowance.

In various embodiments, an application of a client device applying forradio resources may be received; it may be determined whetherinterference of signal transmission during radio communication usingradio resources assigned to the client device is allowed for the clientdevice; and radio resources may be assigned to the client device basedon the determined interference allowance of the client device.

In various embodiments, it may be determined whether interference ofsignal transmission during radio communication using radio resourcesassigned to the client device is allowed for the client device based onan information acquired from a database, which may store interferenceallowance information of each client device, i.e. the database may storea relation between an identifier for identification of the client deviceand interference allowance information indicating whether interferenceof signal transmission during radio communication using radio resourcesassigned to the client device is allowed for the client device.

In various embodiments, it may be determined whether a re-assignment ofradio resources is to be performed.

In various embodiments, it may be determined whether a re-assignment ofradio resources is to be performed based on whether a client devicenewly applies for radio resources. In case a client device newly appliesfor radio resources, radio resources that have previously been assignedto other client devices, may be re-assigned.

In various embodiments, it may be determined whether a re-assignment ofradio resources is to be performed based on whether a client deviceresigns from using the radio resources assigned to the client deviceresigning from using the radio resources. In case a client device doesnot use the radio resources that have been assigned to it anymore, therespective radio resources may be re-assigned.

In various embodiments, it may be determined whether a re-assignment ofradio resources is to be performed based on whether information onwhether interference is allowed for a client device, to which radioresources have been assigned, has changed. In case information onwhether interference is allowed for a client device changes, radioresources may be re-assigned, both to the client device for which theinformation on whether interference is allowed has changed, and also forother client devices.

In various embodiments, an assignment of radio resources to a clientdevice may be computed. It may be configured to determine whether are-assignment of radio resources is to be performed based on thecomputed resource assignment.

In various embodiments, radio resources may be re-assigned based on there-assignment determination.

In various embodiments, radio resources may be re-assigned based on thecomputed resource assignment.

In various embodiments, the radio resources may include distinctsub-areas in the frequency-time plane, as explained in more detailbelow.

In various embodiments, the radio resources may include resourceelements, as will be explained in more detail below.

In various embodiments, the radio resources may include 3GPP LTEresource elements, as will be explained in more detail below.

In various embodiments, radio resources may be assigned exclusively tothe client device, in case the determined interference allowanceindicates that interference is not allowed for the client device.

In various embodiments, radio resources may be assigned non-exclusivelyto the client device, in case the determined interference allowanceindicates that interference is allowed for the client device.

In various embodiments, the location of the client device may bedetermined. In various embodiments, radio resources may be assignednon-exclusively to the client device based on the determined location ofthe client device, in case the determined interference allowanceindicates that interference is allowed for the client device.

In various embodiments, information indicating the radio resourcesassigned to at least one client device may be recorded.

In various embodiments, interference of signal transmission during radiocommunication using the same radio resources at different pre-determinedlocations may be estimated.

In various embodiments, in case of assigning the same radio resourcesnon-exclusively to at least two client devices, the at least two clientdevices may be chosen so that the estimated interference between the atleast two client devices is below a threshold value.

In various embodiments, in case of assigning the same radio resourcesnon-exclusively to at least two client devices, the at least two clientdevices may be chosen so that the estimated interference between the atleast two client devices is a minimum value over all possibleassignments.

In various embodiments, in case of assigning the same radio resourcesnon-exclusively to at least two client devices, the at least two clientdevices may be chosen based on the relative location of the clientdevices.

In various embodiments, the at least two client devices may be chosen sothat the distance between the at least two client devices is higher thana pre-determined threshold value.

In various embodiments, the at least two client devices may be chosen sothat the distance between the at least two client devices is higher thanthe distance between any two of the two client devices and a pluralityof other client devices applying for radio resources. In variousembodiments, a geographic distance may be used as a measure fordistance. In various embodiments, the 1-norm, the 2-norm, any n-normwith a natural number, or the infinity norm may be used as a measure fordistance.

In various embodiments, radio resources of different carrier frequenciesmay be assigned to at least one client device applying for radioresources.

In various embodiments, radio resources of different carrier frequenciesmay be assigned to neighboring client devices applying for radioresources.

In various embodiments, information indicating the location of the radiocommunication device may be transmitted to the radio resource manager.

In various embodiments, the interference allowance information may beset according to an instruction of the user of the radio communicationdevice.

In various embodiments, the interference allowance information may beset according to quality of service requirements of the radiocommunication device.

In various embodiments, the interference allowance information may beset according to an instruction of a user of the client device.

In various embodiments, the interference allowance information may beset according to quality of service requirements of the client device.

In various embodiments, the radio resources may include distinctsub-areas in the frequency-time plane.

In various embodiments, the radio resources may include resourceelements.

In various embodiments, the radio resources may include 3GPP LTEresource elements.

In various embodiments, a radio communication terminal functionality maybe provided by using a radio communication terminal functionalitycircuit, as explained in more detail below.

In various embodiments, a radio base station functionality may beprovided by using an extension circuit in addition to using the radiocommunication terminal functionality circuit, as explained in moredetail below.

In various embodiments, access may be provided to a radio base stationgateway in a radio communication network, as explained in more detailbelow.

In various embodiments, the extension circuit may selectively beactivated, as explained in more detail below.

By selectively activating or de-activating the extension circuit, theextension circuit activator may determine the operation mode of theradio communication device. In case the extension circuit activatorcontrols the extension circuit to be de-activated, the radiocommunication device may perform operation according to a radiocommunication terminal (for example a MD or a UE) using the radiocommunication terminal functionality circuit. In case the extensioncircuit activator controls the extension circuit to be activated, theradio communication device may perform operation according to a radiobase station (for example a femto cell base station, or for example aHome Node B, or for example an eHome Node B) using the radiocommunication terminal functionality circuit and in addition theextension circuit.

In an embodiment, a radio resource management method may be provided. Inthe method, radio resources may be assigned to a client device applyingfor radio resources based on whether interference of signal transmissionduring radio communication using radio resources assigned to the clientdevice is allowed for the client device.

In an embodiment, a method for controlling a radio communication devicemay be provided. In the method, radio resource information may beacquired indicating radio resources assigned to the radio communicationdevice based on whether interference of signal transmission during radiocommunication using radio resources assigned to the client device isallowed for the client device.

In an embodiment, a radio resource management method may be provided. Invarious embodiments of the method, radio resources of different carrierfrequencies may be assigned to at least one client device applying forradio resources. In various embodiments of the method, radio resourcesof different carrier frequencies may be assigned to neighboring clientdevices applying for radio resources.

FIG. 8 shows an architecture 800 of a reconfigurable radio system (RRS)according to an ETSI RRS architecture (ETSI: European TelecommunicationsStandards Institute). In various embodiments, a approach as describedabove and below may be provided on an existing UE reconfigurablearchitecture. The architecture may include an administrator 802, amobility policy manager 804, a networking stack 806, a configurationmanager 808, a radio connection manager 810, a flow controller 812, amulti radio controller 814, a resource manager 816, unified radioapplications 818, and one antenna 820 or more antennas 820. Exchange ofcontrol information is indicated by arrows denoted by “Ctrl”. Exchangeof configuration information is indicated by arrows denoted by “Cfg”.Exchange of data information is indicated by arrows denoted by “Data”.

All services of the device configured according to the architecture mayprovide all its services to the user applications at the MultiradioAccess Interface 822. The services may include connectivity and datatransfer, but also other kind of services like positioning andbroadcasting services. User applications may access the device vianetworking stack 806 and mobility policy manager 804, which may maintainuser preference policies for selecting radios. Additional services forinstalling new radio applications into the device may be available to anadministrator user 802.

The Configuration Manager (CM) 808 may perform installation,de-installation, loading and unloading of radio applications intodevices like radio computer as well as management of and access to theradio parameters of those radio applications.

The Radio Connection Manager (RCM) 810 may perform activation anddeactivation of radio applications according to user requests andoverall management of user data flows, which may also be switched fromone radio application to another.

The Flow Controller (FC) 812 may send and receive user data packets andmay control the flow.

The Multiradio Controller (MRC) 814 may perform scheduling the requestson spectrum resources issued by concurrently executing radioapplications in order to detect in advance the interoperability problemsbetween them.

The Resource Manager (RM) 816 may perform management of radio computerresources in order to share them among simultaneously active radioapplications, while guaranteeing their real-time requirements.

The Unified Radio Applications 818 may include any application loadedonto a processor of a software defined radio (SDR) device.

The Unified Radio Application Interface (URAI) 824 may harmonize thebehavior of radio applications towards the radio computer operatingsystem. All radio applications may access and provide a well-defined setof services specified in the Unified Radio Application Interface 824.

FIG. 9 shows an example of a structure 900 of radio resource elements inaccordance with an embodiment. The resource grid 902 is shown for oneslot 920, for example one uplink slot, or for example for one downlinkslot. The slot may have a time length of Tslot, indicated by referencenumeral 918. The resource grid 902, which may be a resource grid ofSC-FDMA symbols (SC-FDMA: Single-carrier frequency-division multipleaccess), for example, may consist of or include a number of SC-FDMAsymbols in a first dimension, for example N_(symb) ^(UL) SC-FDMA symbolslike indicated by reference numeral 908, and a number of subcarriers ina second dimension, for example N_(RB) ^(UL)×N_(sc) ^(RB) subcarrierslike indicated by reference numeral 910. The resource grid may bedivided into resource blocks. For example, one of the resource blocks902 is indicated by the bold frame. Each resource block may includeN_(sc) ^(RB) subcarriers, like indicated by reference numeral 912. Theresource grid may include N_(RB) ^(UL) resource blocks. A resourceblocks may include N_(symb) ^(UL)×N_(sc) ^(RB) pairs of one SC-FDMAsymbol and one subcarrier. Such a pair may be a resource element. Eachresource element 906 may be addressed by its indices (k,l), where ldenotes the index of the SC-FDMA symbol and k denotes the index of thesubcarrier. l may range from a value of l=0 for the left column(indicated by reference numeral 914) to a value of l=N_(symb) ^(UL)−1 atthe right column (indicated by reference numeral 916). A resource blockmay include N_(symb) ^(UL)×N_(sc) ^(RB) resource elements.

According to various embodiments, in accordance with IEEE 802.16e andIEEE 802.16m, a very similar concept of “Resource Blocks” may be used,which however uses other definitions and terminology. It will beunderstood that various embodiments may be applied to resource blocks ina similar way like described for resource elements.

According to various embodiments, the resources, for example resourceelements, within one channel may be split among various client device,for example FC-BS. According to various embodiments, one specific radioresource, for example one resource element may be attributed to multipleclient devices, instead of being attributed only to one single clientdevice.

According to various embodiment, the selection process for clientdevices, for example FC-BS, to be attributed to radio resources, forexample resource elements of one given channel, is detailed.

According to various embodiments, efficient resource management isprovided if a novel client device, for example a novel FC-BS, enters thenetwork.

According to various embodiments, efficient resource management isprovided if a client device, for example a FC-BS, is switched off orleaves the network.

According to various embodiments, various possibilities of organizingthe frame structure are provided such that multiple client devices, forexample multiple FC-BS, can operate in parallel. According to variousembodiments, this may involve mainly the signaling symbols which cannotbe distributed onto orthogonal resource elements.

In various embodiments, a FC-BS may be considered that may beswitched-off, for example, and the corresponding newly availableresources may be used in order to reconsider the overall resourceattribution to all FC-BS. In various embodiments, a new overall resourceassignment may be provided in order to reduce the overall interferencelevels (assuming that no entirely interference free configuration may bepossible for meeting the throughput requirements).

The number of available distinct channels (on distinct carrierfrequencies) may be limited to a small number. It may be considered tobe insufficient for a broad deployment of radio communication devices,for example FC-BS. According to various embodiment, not a whole channel(i.e. all “Resource Elements” within one “transmitted signal” as definedabove) may be assigned to a given FC-BS, but only a fraction of it byassigning parts of the “Resource Elements” within a channel to multipleFC-BS.

According to various embodiments, the resources within one channel maybe split among various radio communication devices, for example FC-BS.The entire set of “Resource Elements” as defined above and asillustrated in FIG. 9 may not necessarily be attributed to one singleradio communication device, for example one single FC-BS, but they maybe shared among multiple radio communication devices, for examplemultiple FC-BS. This may help to avoid interference on the data-parts bydistributing the resource elements such that no interference may occur(in other words: an orthogonal distribution of resource elements).

FIG. 10 shows a deployment scenario 1000 in accordance with anembodiment. The devices present in the scenario and the basic layout arethe same as in the scenario 100 shown in FIG. 1. Therefore, descriptionthereof is omitted. It is to be noted that the second radiocommunication device 116 and the third radio communication device 118are shown to be at different locations compared to the scenario 100shown in FIG. 1. The first to thirteenth radio communication devices maymove freely; it will be explained below, how movement and thus entranceand exit of radio communication devices into service areas may behandled.

According to various embodiments, subsets of the available ResourceElements within one channel are attributed to a set of radiocommunication devices, for example FC-BS. In FIG. 10, this isillustrated for two channels (“transmitted signals”) with differentcarrier frequencies.

A first channel 1002 may be provided to the first radio communicationdevice 114, the third radio communication device 118 and the fourthradio communication device 120. Different resource elements may beprovided on the first channel 1002 to each of the first radiocommunication device 114, the third radio communication device 118 andthe fourth radio communication device 120. A first set of resourceelements 1004 on the first channel 1002 may be provided to the firstradio communication device 114. A second set of resource elements 1008on the first channel 1002 may be provided to the fourth radiocommunication device 120. A third set of resource elements 1010 on thefirst channel 1002 may be provided to the third radio communicationdevice 118. The first set of resource elements 1004 on the first channel1002, the second set of resource elements 1008 on the first channel1002, and the third set of resource elements 1010 on the first channel1002, may also be considered as to form the available resources in afirst transmitted signal.

A second channel 1012 may be provided to the second radio communicationdevice 116 and the fifth radio communication device 122. Differentresource elements may be provided on the second channel 1012 to thesecond radio communication device 116 and the fifth third radiocommunication device 122. A first set of resource elements 1014 on thesecond channel 1012 may be provided to the fifth radio communicationdevice 122. A second set of resource elements 1016 on the second channel1012 may be provided to the second radio communication device 116. Thefirst set of resource elements 1014 on the second channel 1012 and thesecond set of resource elements 1016 on the second channel 1012 may alsobe considered as to form the available resources in a second transmittedsignal.

It will be understood that although the region of resource elementsassigned to each of the radio communication devices is shown as arectangular block in the channel grid, the resource elements do not haveto be arranged in this shape. Resource elements may be attributed inregions of any shape, wherein the regions do not even have to beconnected. Furthermore, although the scenario is described with respectto resource elements, any other division of radio resources may be usedaccording to various embodiments. Although only two channels are presentin the scenario, it is to be understood that the number of channels isnot limited to two.

In the example of allocation of 3GPP LTE Resource Elements to variousFemto-Cells (with each “transmitted signal” using a distinct carrierfrequency) according to FIG. 10, the assignment of resources may benon-overlapping and thus any interference on the data-part of the framemay be avoided.

For the scenario of FIG. 10, it may be assumed that enough availableresources are available in order to assign distinct resources todistinct radio communication devices, for example to distinctFemto-Cells. This may enable an interference-free operation for thedata-portion of the frame. It will be illustrated below how to extendthis optimum scenario to the case where a certain allowed level ofinterference may help to maximize the overall system throughput.

This attribution of sub-sets of radio resource, for example of sub-setsof resource elements, to various radio communication devices, forexample FC-BS, may be controlled by an operator. The correspondingattribution (decision making) unit, circuit or device may be locatedwithin the operator's core network. The hierarchical principle of thisattribution will be further illustrated in the following.

FIG. 11 shows an illustration 1100 of hierarchical radio resourcemanagement and allocation of resource elements in accordance with anembodiment. In this embodiment, the assignment of resources may benon-overlapping and any interference on the data-part of the frame maybe avoided. According to various embodiments, hierarchical attributionof interference-free resources may be provided.

In the scenario of FIG. 11, an operator, indicated by a base stationsymbol 1102, may assign radio resources, for example carrier frequenciesand sub-sets of resource elements, to a plurality of radio communicationdevices, for example to various FC-BS, or for example to a first radiocommunication device 1104, a second radio communication device 1106, athird radio communication device 1108, a fourth radio communicationdevice 1110, and a fifth radio communication device 1112. For example,each of the plurality of radio communication devices may be configuredas a femto cell base station, indicated by a femto-cell base stationsymbol.

A first channel may be assigned to the first radio communication device1104 and to the second radio communication device 1106. A second channelmay be assigned to the third radio communication device 1108, to thefourth radio communication device 1110, and to the fifth radiocommunication device 1112. Note that the different channels areindicated by different hatchings in the resource elements 1120 to 1134that will be explained later.

The first radio communication device 1104 may be assigned the firstresource elements 1120 on the first channel, i.e. the first resourceelements 1120 on the first channel may be the used resources in thefirst transmitted signal for the first radio communication device 1104.

The second radio communication device 1106 may be assigned the secondresource elements 1122 on the first channel, i.e. the second resourceelements 1122 on the first channel may be the used resources in thefirst transmitted signal for the second radio communication device 1106.

The third radio communication device 1108 may be assigned the firstresource elements 1124 on the second channel, i.e. the first resourceelements 1124 on the second channel may be the used resources in thesecond transmitted signal for the third radio communication device 1108.

The fourth radio communication device 1110 may be assigned the secondresource elements 1126 on the second channel, i.e. the second resourceelements 1126 on the second channel may be the used resources in thesecond transmitted signal for the fourth radio communication device1110.

The fifth radio communication device 1112 may be assigned the thirdresource elements 1128 on the second channel, i.e. the third resourceelements 1128 on the second channel may be the used resources in thethird transmitted signal for the fifth radio communication device 1112.

After having been assigned resources, each radio communication device,for example each FC-BS, may perform an allocation of the resourceswithin its sub-set of resource elements.

For example, the second radio communication device 1106 may receiveapplications for radio resources from one or more radio communicationdevices. For example, the second radio communication device 1106 mayreceive applications for radio resources from a sixth radiocommunication device 1114, from a seventh radio communication device1116 and from an eighth radio communication device 1118. Each of thesixth radio communication device 1114, the seventh radio communicationdevice 1116 and the eighth radio communication device 1118 may beconfigured according to a UE, indicated by the mobile telephone symbol.For example, the second radio communication device 1106 may assign radioresources 1130, which are a subset of the second radio resources 1122 onthe first channel that have been assigned to the second radiocommunication device 1106, to the sixth radio communication device 1130.Likewise, the second radio communication device 1106 may assign radioresources 1132, which are a subset of the second radio resources 1122 onthe first channel that have been assigned to the second radiocommunication device 1106, to the seventh radio communication device1132. Furthermore, the second radio communication device 1106 may assignradio resources 1134, which are a subset of the second radio resources1122 on the first channel that have been assigned to the second radiocommunication device 1106, to the eighth radio communication device1134.

According to the scenario of FIG. 11, introduction of interference maybe avoided in the hierarchical radio resource management. Each of theradio communication devices that are assigned radio resources from thenetwork operator, may receive distinct radio resources, by usingdifferent channels and/or by using different resource elements.Furthermore, each of those radio communication devices, for exampleFC-BS, may further assign parts of the radio resources it has beenassigned, to radio communication devices, for example UE, applying forradio resources.

In case that the fully orthogonal distribution of resource isinsufficient in order to achieve the desired QoS (or to maximize theoverall system throughput), the following approach may be taken inaccordance with various embodiments: According to various embodiments,the resources within one channel may be split among various radiocommunication devices, for example FC-BS, while a controlled level ofinterference may be allowed between some selected radio communicationdevices. It is to be noted that the controlled level of interference maybe introduced in any layer of the hierarchical radio resourcemanagement, i.e. both in the assignment of radio resources from anetwork operator to radio communication devices such as FC-BS, and fromthose radio communication devices to further radio communicationdevices, such as UE.

According to various embodiments, application of HRRM may be performedin the following steps:

1) A central controller may distribute carrier frequencies and sub-setsof radio resources among radio communication devices, for example FC-BS;for this purpose, assignment interleaving may be applied as will beexplained in more detail below;

2) Each radio communication device may calculate an optimum allocationof the resources (that may have been assigned before to this specificradio communication devices, for example FC-BS) to further radiocommunication devices, for example UEs, which are attached to thisspecific radio communication device, for example FC-BS.

The communication may start between the further radio communicationdevices, for example UEs, and the radio communication devices, forexample FC-BS, they are assigned to. The above described steps may allowa very dense deployment of radio communication devices, for exampleFC-BS, such as it may be expected for densely populated housing areas,etc.

FIG. 12 shows an illustration 1200 of radio resource managementtolerating the presence of interference in accordance with anembodiment. An operator, indicated by a base station symbol 1202, mayassign radio resources, for example carrier frequencies and sub-sets ofresource elements, to radio communication devices, for example tovarious FC-BS. For example, the operator 1202 may assign radio resourcesto a first radio communication device 1204, to a second radiocommunication device 1206, to a third radio communication device 1208,to a fourth radio communication device 1210, and to a fifth radiocommunication device 1212. In the scenario of FIG. 12, it is assumedthat all radio resources are used in the same transmitted signal, forexample on the same channel.

In this scenario, it may be assumed that there are not enough availableradio resources in order to assign distinct radio resources to distinctradio communication device, for example FC-BS establishing femto-cells.Depending on the actual femto-cell deployment, this may be preferablecompared to the solution of FIG. 11 with respect to the overall systemthroughput maximization and user satisfaction.

It may not always be optimum to avoid any interference—for example froman overall system throughput perspective. Depending on the desiredoperational modes for the various devices (in particular, the parametersimpacting the physical layer performance are of importance, such asmodulation (QPSK (Quadrature phase-shift keying), QAM-16 (QAM:Quadrature amplitude modulation), QAM-64, etc.), the FEC (forward errorcorrection) code-rate (R=½, ⅔, . . . ), etc.). If a certain moderequires a very high level of robustness, it may be desirable to avoidany interference. However, if a moderate or low level of robustness ischosen, some (controlled) level of interference may be not impacting thesystem interference and may lead to a higher overall throughput.

In various embodiments, robustness may be understood in terms of a highsignal-to-noise-plus-interference ratio (SINR), i.e. a mode thatrequires a pre-defined level of robustness may require that the SINR ishigher than a pre-defined threshold.

In various embodiments, each of the plurality of radio communicationdevices may be configured as a femto cell base station, indicated by afemto-cell base station symbol.

For example, the first radio communication device 1204, the second radiocommunication device 1206 and the fifth radio communication device 1212allow a given level of interference. This may result in that very highthroughput modes may be not available for these radio communicationdevices, but may lead to efficient resource usage for distant radiocommunication devices, for example FC-BS establishing femto cells, atlow to mid range efficient modes. As a result, according to variousembodiments, the first radio communication device 1204, the second radiocommunication device 1206 and the fifth radio communication device 1212may be assigned radio resources that may cause interference. In variousembodiments, the radio resources may be assigned so that even ifinterference is allowed, interference may be minimized by assigningpartially overlapping radio resources (that is radio resources which mayprobably cause interference) to distant radio communication devices. Inthe example shown in FIG. 12, the first radio communication device 1204is assigned the first radio resources 1214, the second radiocommunication device 1206 is assigned the second radio resources 1214,and the fifth radio communication device 1212 is assigned the radioresources 1222. Thus, as shown in FIG. 12, the first radio communicationdevice 1204 may possible experience interference with the fifth radiocommunication device 1212. However, because the first radiocommunication device 1204 and the fifth radio communication device 1222are located far from each other, interference may be low. Similarly,only low interference may be cause between the second radiocommunication device 1206 and the fifth radio communication device 1212.The first radio communication device 1204, and the second radiocommunication device 1206, which may be located close to each other, maynot experience interference from each other, because they may usedistinct radio resources.

For example, the third radio communication device 1208 and the fourthradio communication device 1210 may be configured to not allow anyinterference. This may allow high-troughput modes.

Therefore, according to various embodiments, the third radiocommunication device 1208 may be assigned third radio resources 1218exclusively. Only the third radio communication device 1208 may use thethird radio resources 1218. Therefore, the third radio communicationdevice 1208 may experience no interference. Similarly, the fourth radiocommunication device 1210 may be assigned fourth radio resources 1220exclusively. Only the fourth radio communication device 1210 may use thefourth radio resources 1220. Therefore, the fourth radio communicationdevice 1220 will experience no interference.

In the scenario of FIG. 12, it may be desirable that the interferencegenerated by the first radio communication device 1204, the second radiocommunication device 1206 and the fifth radio communication device 1212is as low as possible. According to various embodiments, this may beachieved by assigning the corresponding radio resources togeographically distant radio communication devices. The principle willbe illustrated in the sequel.

FIG. 13 shows an illustration 1300 of positioning of interference radiocommunication devices, i.e. radio communication devices that allowinterference, in the framework of radio resource management inaccordance with an embodiment. The radio communication devices and theradio resources are the same as in FIG. 12, and a repeated explanationthereof is omitted.

According to various embodiments, if the amount of available radioresources requires that the occupied radio resources of two or moreradio communication devices are overlapping, the most distant radiocommunication devices may use overlapping resources and thus theinterference may be minimized. This is illustrated in FIG. 13 by theellipse 1302. The second radio communication device 1206, the thirdradio communication device 1208 and the fourth radio communicationdevice may use distinctive radio resources, and thus do not interferewith each other. The possibly interfering radio communication devices,the first radio communication device 1214 and the fifth radiocommunication device 1222 may have been chosen to be the most distantradio communication devices.

FIG. 14 shows a flow diagram 1400 illustrating the process of selectingan interfering radio communication device in accordance with anembodiment, in case that the total amount of radio resources is notsufficient for ensuring interference-free communication; in other words:the flow diagram 1400 shows the flow for the identification process forradio communication devices that may undergo interference.

In 1402, the number of interfering radio communication devices may beset to i=0 and the set of interfering radio communication devices may beset to s={ }, being the empty set.

In 1404, the available resources may be assigned among all radiocommunication devices such that at maximum “i” radio communicationdevice resource parts belonging to radio communication devices from theset “s” are undergoing mutual interference.

In 1406, it may be determined whether all quality of service (QoS)requirements are met.

In case it is determined that all quality of service requirements aremet (Yes in 2006), the identified resource distribution may be used(1408).

In case it is determined that not all quality of service requirementsare met (No in 1406), then in 1410 the number of resource parts that mayundergoing interference may be increased, i.e. i may be increased byone, i.e. i=i+1. The resources attributed to two or more radiocommunication devices that are mutually interfering may be considered asthe resource parts that are undergoing interference.

In 1412, the set “s” of interfering radio communication devices may beidentified such that the overall QoS requirements may be met. This setmay need to be derived from scratch following each iterative step ofthis process; it may be not able to build on a simple extension of theset from the previous step.

FIG. 15 shows an illustration 1500 of radio resource managementtolerating the presence of interference in accordance with anembodiment. According to various embodiments, hierarchical attributionof resources tolerating a controlled level of interference is provided.Similar to the illustration 1100 of FIG. 11, a plurality of radiocommunication devices 1506, 1508, 1510, 1512, 1514 may be assigned radioresources 1516, 1518, 1520, 1522, 1524, and each radio communicationdevice may further assign the radio resources assigned to it to furtherradio communication devices (for example, the second radio communicationdevice 1508 may further assign parts of the radio resources 1518assigned to it to a sixth radio communication device 1526 (radioresources 1532), to a seventh radio communication device 1528 (radioresources 1534) and to an eighth radio communication device 1530 (radioresources 1530). Therefore, detailed description of the radiocommunication devices is omitted. According to various embodiments, thefollowing modifications compared to the scenario according to FIG. 11are provided in order to include the controlled admission ofinterference for some radio communication devices. An additional deviceor circuit implementing an additional layer that may deal with theinterference may be provided. The additional device or circuitimplementing the additional layer may identify and group the radiocommunication devices for which a controlled level of interference isacceptable (indicated by block 1502; in this case for example the firstradio communication device 1506, the second radio communication device1508, the third radio communication device 1510, and the fourth radiocommunication device 1512) and may identify and group the radiocommunication devices for which full interference avoidance is desired(indicated by block 1504; in this case for example the fifth radiocommunication device 1514). According to various embodiments, acontrolled level of interference may be tolerated. According to variousembodiments, as illustrated in FIG. 15, also radio communication devicesthat tolerate interference may further assign the assigned radioresources to further radio communication devices, like for example thesecond radio communication device 1508.

FIG. 16 shows an illustration 1600 of adding a new radio communicationdevice with tolerating a controlled level of interference in accordancewith an embodiment. The radio communication devices and the assignedradio resources are the same as those in FIG. 12. Therefore, descriptionthereof is omitted.

In the upper part of FIG. 16, a scenario is shown, where a plurality ofradio communication devices (the first to fourth radio communicationdevice of FIG. 12) are active. Communication may be performed withoutany interference, indicated by ellipse 1602. Then, indicated by thearrow 1604, in the lower part of FIG. 16, the fifth radio communicationdevice 1212 is switched on or moves into the considered region. Then,according to various embodiments, assuming that the amount of availableradio resources requires that the occupied radio resources of two radiocommunication devices are overlapping, the interference may be minimizedand the most distant radio communication devices may use overlappingresources. Communication without interference may occur between thesecond radio communication device 1206, the third radio communicationdevice 1208 and the fourth radio communication device 1210, as indicatedby ellipse 1606.

According to various embodiments, methods and devices are provided foractivation of a new radio communication device and allocation ofcorresponding radio resources. In this case, it may be assumed that mostor all of the available radio resources are attributed to radiocommunication devices in a given area. It may be assumed that suddenly,a new radio communication device may enter this scenario and may requestalso a set of radio resources.

In this case, according to various embodiments, two approaches arepossible:

1) Complete redistribution of all radio resources among all radiocommunication devices as indicated above (which may be consideredoptimum from an overall resource usage efficiency perspective, but maybe not desired from a practical perspective since all elements in thenetwork may have to be reconfigured); or

2) Keep the current configuration and identify radio communicationdevices for which a set of interfering resource blocks originating fromthe novel radio communication device is tolerable, as illustrated withreference to FIG. 16.

The corresponding decision process will be illustrated in the sequel.

FIG. 17 shows a flow diagram 1700 illustrating an identification processfor newly entering radio communication devices in accordance with anembodiment.

In 1702, a new radio communication device may desire to enter thenetwork.

In 1704, it may be determined whether there are enough radio resourcesavailable to guarantee an interference-free operation.

If it is determined that there are enough radio resources available toguarantee an interference-free operation (Yes in 1704), available radioresources may be assigned to new radio communication device such that nointerference occurs (1706).

If it is determined that there are not enough radio resources availableto guarantee an interference-free operation (No in 1704), it may bedetermined in 1708 whether the new radio communication device cantolerate interference on the radio resources it is intending to use.

In case it is determined that the new radio communication device can nottolerate interference on the radio resources it is intending to use (Noin 1708), a full re-assignment of radio resources for whole network maybe started (1710).

In case it is determined that the new radio communication device cantolerate interference on the radio resources it is intending to use (Yesin 1708), radio communication devices which can allow additionalinterference on the currently used radio resources may be identified in1712.

In 1714, identified resources may be assigned to the new radiocommunication device.

FIG. 18 shows an illustration 1800 of de-activation of a radiocommunication device combined with the reduction of interference inaccordance with an embodiment. The radio communication devices and theassigned radio resources are the same as those in FIG. 12. Therefore,description thereof is omitted.

In the upper part of FIG. 18, the first to fifth radio communicationdevice of FIG. 12 are communicating, and are partially experiencinginterference.

Assuming that the amount of available radio resources requires that theoccupied radio resources of two or more radio communication devices areoverlapping, the interference may be minimized and thus the most distantradio communication devices may use overlapping resources.

Then, for example, the fourth radio communication device 1208 intends tobe switched off. After the fourth radio communication device 1208 hasbeen switched off, as indicated by arrow 1804 and cross 1808, accordingto an embodiment, the radio resources of the first radio communicationdevice 1204 may be changed, as indicated by arrow 1804 to new radioresources 1806. According to an embodiment, this may lead to acommunication without any interference, i.e. no interference may occuranymore.

According to various embodiments, methods and devices are provided forde-activation of a radio communication device. According to variousembodiments, in case that a radio communication device is switched off,the following steps may be taken with respect to the radio resourcesthat were occupied by the concerned radio communication device:

1) Simplest case: All other radio communication devices may continueoperating as before, no redistribution of unused resources may beperformed. This approach is inherently simple, but this approach may notbe optimum from an overall resource usage efficiency perspective.

2) Avoidance of interference: A selective radio resource re-distributionmay be performed in order to minimize the interference which some radiocommunication devices are undergoing. The principle is illustrated inFIG. 18.

The corresponding process according to various embodiments is detailedin the following.

FIG. 19 shows a flow diagram 1900 illustrating an identification processfor switching-off a radio communication device in accordance with anembodiment.

In 1902, a radio communication device may desire to be switched-off

In 1904, it may be determined whether the remaining radio communicationdevices are enjoying an interference-free operation.

In case it is determined that the remaining radio communication devicesare enjoying an interference-free operation (Yes in 1904), the concernedradio communication device may be switched off without performing are-distribution of radio resource (1906).

In case it is determined that the remaining radio communication devicesare not enjoying an interference-free operation (No in 1904), it may bedetermined in 1908 whether one or several of the remaining radiocommunication devices may be reconfigured such that they can efficientlyuse the resources of the radio communication device to be switched off.

In case it is determined that none of the remaining radio communicationdevices may be reconfigured such that they can efficiently use theresources of the radio communication device to be switched off (No in1908), the concerned radio communication device may be switched offwithout performing a re-distribution of radio resource (1910).

In case it is determined that one or several of the remaining radiocommunication devices may be reconfigured such that they can efficientlyuse the resources of the radio communication device to be switched off(Yes in 1908), the radio communication devices which can reduceinterference by using the spectrum that will be freed by the radiocommunication device to be switched off may be identified (1912).

In 1914, identified resources may be assigned to the identified radiocommunication device or to the identified radio communication devices.

FIG. 20 shows a frame structure 2000, in particular a frame structuretype 2 (TDD (Time Division Duplex) mode) for 3GPP LTE. While theResource Elements can be shared among multiple radio communicationdevices, it is not possible to do the same for the remaining parts ofthe frame, such as synchronization sequence fields, etc. These parts areillustrated by the following. The structure 2000 shows one radio frame2002, for example of the length T_(f)=307200, T_(s)=10 ms, including twohalf frames 2004, for example of the length 153600T_(s)=5 ms. The framemay be split into a plurality of subframes 2006 _(i), for example oflength 30720T_(s). A slot 2008 in a subframe may be of the length Oneslot, T_(slot)=15360Ts. Specific subframes may be reserved fortransmission of special fields 2010, 2012, and 2014 as will be explainedin more detail below, for example synchronization sequence fields.

For example, for frame structure type 2, the primary synchronizationsignal may be transmitted in the first symbol of the DwPTS (DownlinkPilot Timeslot) field 2010. The corresponding frequency band may be notshared among multiple radio communication devices, for example FC-BS, ina completely orthogonal way if the upper frame structure needs to bemaintained.

However, there may be a fundamental difference between these specialfields (in particular, DwPTS 2010, GP (Guard Period) 2012 and UpPTS(Uplink Pilot Timeslot) 2014) in comparison to other data-carrying field(consisting of the “Resource Elements” structure): The data-carryingfield may desire a high SINR in order to enable high-throughput modes;the special fields (in particular, DwPTS, GS and UpPTS, pilots, etc.),however, may be designed to operate at poor SINR levels sufficientlywell. I.e. it may be sufficient to achieve a distribution of resourcesthat guarantees high SINR levels for the data-carrying fields andaverage-SINR levels for the special fields.

According to various embodiments, assignment interleaving of distinctcarriers and distinct radio resource sub-sets, for example resourceelement sub-sets, to the various radio communication devices, forexample FC-BS, may be provided as illustrated in the following.

FIG. 21 shows a radio communication system providing assignmentinterleaving of distinct carriers and distinct radio resources inaccordance with an embodiment. A first radio communication device 2102may be assigned a first carrier frequency. A second radio communicationdevice 2104 may be assigned a second carrier frequency. A third radiocommunication device 2106 may be assigned the first carrier frequency. Afourth radio communication device 2108 may be assigned the secondcarrier frequency. A fifth radio communication device 2110 may beassigned the first carrier frequency. The first carrier frequency may bedifferent from the second carrier frequency.

Furthermore, radio resources of the first carrier frequency may beassigned in a non overlapping way like described above. Thus, nointerference among radio resources, for example resource elements, maybe present due to orthogonal assignment, between the first radiocommunication device 2102, the third radio communication device 2106 andthe fifth radio communication device 2110 using the first carrierfrequency like indicated by reference numerals 2112. Only low-levelinterference on special fields may occur for these radio communicationdevices, since frequencies may be overlapping, but transmitters aredistant.

Likewise, radio resources of the second carrier frequency may beassigned in a non overlapping way like described above. Thus, nointerference among radio resources, for example resource elements, maybe present due to orthogonal assignment, between the second radiocommunication device 2104 and the fourth radio communication device 2106using the second carrier frequency like indicated by reference numeral2114. Only low-level interference on special fields may occur for theseradio communication devices, since frequencies may be overlapping, buttransmitters are distant.

Furthermore, no interference may be present between two neighboringradio communication devices (for example between the first radiocommunication device 2102 and the second radio communication device2104; and between the second radio communication device 2104 and thethird radio communication device 2106; and between the third radiocommunication device 2106 and the fourth radio communication device2108; and between the fourth radio communication device 2108 and thefifth radio communication device 2110) and due to distinct carrierfrequencies, like indicated by reference numerals 2116.

It is to be noted that the example scenario 2100 has been shown for fiveradio communication devices, but the number of radio communicationdevices to which assignment interleaving may be applied is not limitedto five but may be any natural number. Furthermore, although two carrierfrequencies have been assumed to be used in the example scenario 2100,the number of distinct carrier frequencies is not limited to two, butmay be any natural number. Furthermore, although the example scenario2100 has been shown for a one-dimensional neighborhood, i.e. the radiocommunication devices have been shown to be aligned in a line,assignment interleaving may also be applied to radio communicationdevices provided in a two-dimensional way.

It is to be noted that the scenario 1000 in FIG. 10 uses assignmentinterleaving.

FIG. 22 shows an architecture of a reconfigurable radio system 2200 inaccordance with an embodiment, for example, the extension of an ETSI RRSSDR Architecture in order to enable HRRM. Some parts of the system 2200are identical to parts of the system 800 of FIG. 8 and duplicatedescription of those parts is omitted. The system 2200 additionallyincludes a protocols section 2204 and an engines section 2202.

The usage of HRRM may be added into the UE architecture introduced byETSI RRS. According to various embodiments, the functionalities may becomplemented by the following:

1) Resource Allocation management 2208 (which may be not handled in theUE, but by the BS) on the application side;

2) Resource Allocation management 2206 on the SDR processor side, whichmay be included onto an application processor implemented within the SDRdevice for the actual derivation of the assignment of available ResourceElements to UEs attached to the FC-BS;

3) Connection to FC Gateway 2210 on the application side.

In other words, a HRRM device may be integrated into a dual modeFC-BS/UE device, and three extensions of the SDR UE architecture areprovided in accordance with an embodiment:

1) A novel resource manager may be added on the application level withthe objective to manage the sub-set of Resource Elements that isassigned to the specific FC-BS;

2) A novel resource manager may be included onto the applicationprocessor within the SDR device. The resource management calculator 2206may perform the derivation of the assignment of Resource Elements to UEsattached to the FC-BS, taking into account the overall availableResource Elements that were attributed to this FC-BS;

3) A novel resource manager may be included onto the applicationprocessor within the SDR device. This novel resource manager may performthe derivation of the assignment of Resource Elements to UEs attached tothe FC-BS, taking into account the overall available Resource Elementsthat were attributed to this FC-BS,

The resource management 2208 and the RRM application processor 2206, forexample an ARM processor, may be connected, as indicated by connection2212.

In the ETSI RRS architecture representation, it may be desired tohighlight which functionalities are provided by the application-centricpart (i.e. on the uppermost level, currently including the blocksAdministration 802, Mobility Policy Manager 804 and Networking Stack806).

FIG. 23 shows an architecture 2300 of a reconfigurable radio system inaccordance with an embodiment. In particular, the architecture shows theinclusion of an extended resources activator 2302 into the ETSI RRSArchitecture.

Since part of the resources in the SDR processor may only be used if thedevice operates as a FC-BS (and not if it operates as a standard UE), acontrol module (extended resources activator 2302) may be inserted whichactivates the additional FC-BS resources on the SDR processor if it isdesired.

Some parts of the system 2300 are identical to parts of the system 2200of FIG. 22 and duplicate description of those parts is omitted. System2300 additionally includes the extended resources activator 2302, whichmay control the configuration manager 808, the unified radioapplications 818 and the resource manager 816. The unified radioapplications may include one or more application processors and a SDRprocessor.

In various embodiments, it may not be distinguished between controlinformation and configuration information in FIG. 8, FIG. 22 and FIG.23, i.e. anywhere where control information is indicated to beinterchanged, control information or configuration information may beinterchanged, and likewise, anywhere where configuration information isindicated to be interchanged, control information or configurationinformation may be interchanged.

The extended resources activator 2302 may control activation ofresources that may be used to provide the functionality of a FC-BS inaddition to a UE. This may allow implementation of a device that mayoperate as a Femto-Cell BS or as a standard UE. Such a device may be inparticular important in the following context:

1) Femto-Cell BS may be mobile: In this case, the Femto-Cell BS may beassumed to be transported by a user from one location to another,potentially to a foreign country. Corresponding requirements may havebeen provided as inputs from the national regulators. In such a context,the FC BS may desire to acquire knowledge about the operationalparameters which may be applied, once the FC BS is switched on. In orderto acquire these parameters, it may be expected that the FC BS has tooperate as a standard UE, to maintain a connection to a neighboringMacro-BS and to recover the corresponding information while operating asa standard UE. Consequently, a device may be provided which is able tooperate as FC BS as well as in a standard UE mode.

2) User device may either operate as UE or has high-speed (cabled, etc.)Internet access and may serve as BS for others: A scenario may be ameeting or similar. One user may be assumed to have a high-speed(cabled, etc.) Internet access while all others may be assumed tooperate via a wireless link. In such a case, one user may decide tooperate his device as a FC BS serving all others who are configured tooperate as standard UEs. Consequently, a device may be provided which isable to operate as FC BS as well as in a standard UE mode.

Based on this framework, it may be possible to use the architecture of areconfigurable UE and to add additional functionalities on top of it, inorder to enable the user to switch between UE and FC BS operationalmodes.

While the invention has been particularly shown and described withreference to specific embodiments, it should be understood by thoseskilled in the art that various changes in form and detail may be madetherein without departing from the spirit and scope of the invention asdefined by the appended claims. The scope of the invention is thusindicated by the appended claims and all changes which come within themeaning and range of equivalency of the claims are therefore intended tobe embraced.

What is claimed is:
 1. A radio resource manager device, comprising: areceiver configured to receive an application applying for radioresources; an interference allowance determiner configured to determinewhether interference of signal transmission during radio communicationusing radio resources is allowed; and a radio resource assignerconfigured to assign radio resources based on the determinedinterference allowance, wherein the receiver is further configured toreceive an application of a client device applying for radio resources,wherein the interference allowance determiner is further configured todetermine whether interference of signal transmission during radiocommunication using radio resources assigned to the client device isallowed for the client device, wherein the radio resource assigner isfurther configured to assign radio resources to the client device basedon the determined interference allowance of the client device, whereinthe radio resource assigner is further configured to assign radioresources exclusively to the client device, in case the determinedinterference allowance indicates that interference is not allowed forthe client device, and wherein the radio resource assigner is furtherconfigured to assign radio resources non-exclusively to the clientdevice, in case the determined interference allowance indicates thatinterference is allowed for the client device, the non-exclusiveassignment of radio resources being for concurrent uplink communicationof more than one client device.
 2. The radio resource manager device ofclaim 1, further comprising: a radio resource re-assignment determinerconfigured to determine whether a re-assignment of radio resources is tobe performed.
 3. The radio resource manager device of claim 2, whereinthe radio resource re-assignment determiner is configured to determinewhether the re-assignment of radio resources is to be performed based onwhether a client device newly applies for radio resources.
 4. The radioresource manager device of claim 2, wherein the radio resourcere-assignment determiner is configured to determine whether there-assignment of radio resources is to be performed based on whether aclient device resigns from using the radio resources assigned to theclient device resigning from using the radio resources.
 5. The radioresource manager device of claim 2, wherein the radio resourcere-assignment determiner is configured to determine whether there-assignment of radio resources is to be performed based on whetherinformation on whether interference is allowed for a client device, towhich the radio resource manager has assigned radio resources, haschanged.
 6. The radio resource manager device of claim 2, furthercomprising a virtual radio resource assigner configured to compute anassignment of radio resources to a client device; wherein the radioresource re-assignment determiner is configured to determine whether there-assignment of radio resources is to be performed based on the resultof the virtual radio resource assigner.
 7. The radio resource managerdevice of claim 1, wherein the radio resources comprise at least one ofthe following: distinct sub-areas in the frequency-time plane; and 3GPPLTE resource elements.
 8. The radio resource manager device of claim 1,wherein the radio resource assigner is further configured in case ofassigning the same radio resources non-exclusively to at least twoclient devices and configured to choose the at least two client devicesbased on the relative location of the client devices.
 9. A radioresource manager device, configured to: determine an interferenceallowance for a client device that is applying for radio resources tooperate a femto-Node B; assign radio resources non-exclusively to theclient device when interference is determined to be above theinterference allowance; assign radio resources exclusively to the clientdevice when interference is determined to be at or below theinterference allowance, wherein radio resources that are assignednon-exclusively are assignable is for concurrent assignment to anotherclient device for operation of another femto-Node B, and wherein radioresources are assigned exclusively to the client device wheninterference is not allowed for the client device.
 10. A radio resourcemanager device, comprising: a receiver configured to receive respectiveapplications associated with respective client devices applying forradio resources; an interference allowance determiner configured todetermine whether interference of signal transmission during radiocommunication using radio resources assigned to each of the clientdevices is allowed for each of the client devices; and a radio resourceassigner configured to assign respective radio resources to each of theclient devices based on the determined interference allowances for eachof the client devices, wherein each of the plurality of client devicesis to provide a cell based on respective assigned radio resources, andwherein the radio resource assigner is configured to select at least twoclient devices for a non-exclusive assignment of the same radioresources based on the relative location of the two client devices.